:root {
  --bg: #f4f7fb;
  --surface: rgba(255, 255, 255, 0.92);
  --surface-strong: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --primary: #2563eb;
  --primary-soft: #e0f2fe;
  --border: rgba(148, 163, 184, 0.22);
  --card-shadow: 0 24px 60px rgba(15, 23, 42, 0.08);
  --radius: 24px;
  color-scheme: light;
  color: var(--text);
  background: var(--bg);
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  line-height: 1.7;
}

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(180deg, #f8fbff 0%, #eef4fb 100%);
  color: var(--text);
  scroll-behavior: smooth;
}

* {
  box-sizing: border-box;
}

img {
  max-width: 100%;
  display: block;
}

button,
a {
  transition: all 0.25s ease;
}

.page-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem 2rem;
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid rgba(148, 163, 184, 0.18);
  backdrop-filter: blur(14px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: 0.9rem;
  background: var(--primary);
  color: #ffffff;
  font-weight: 800;
}

.brand-label {
  margin: 0;
  font-weight: 700;
}

.brand-subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.main-nav {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  align-items: center;
}

.main-nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
}

.main-nav a:hover {
  color: var(--text);
}

.theme-toggle {
  width: 3rem;
  height: 3rem;
  border-radius: 999px;
  border: 1px solid rgba(37, 99, 235, 0.18);
  background: var(--surface-strong);
  cursor: pointer;
  font-size: 1.1rem;
}

.hero-section {
  display: grid;
  grid-template-columns: 1.35fr 0.95fr;
  gap: 2rem;
  padding: 4rem 2rem 3rem;
  align-items: center;
}

.hero-copy {
  max-width: 680px;
}

.eyebrow {
  display: inline-flex;
  margin-bottom: 1.25rem;
  color: var(--primary);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.85rem;
}

.hero-section h1 {
  font-size: clamp(3rem, 5vw, 4.75rem);
  margin: 0;
  line-height: 0.95;
}

.hero-text {
  margin: 1.75rem 0 2.25rem;
  max-width: 640px;
  color: var(--muted);
  font-size: 1.08rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 1.5rem;
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
  border: none;
  cursor: pointer;
}

.btn.primary {
  background: var(--primary);
  color: white;
}

.btn.secondary {
  background: rgba(37, 99, 235, 0.08);
  color: var(--primary);
  border: 1px solid rgba(37, 99, 235, 0.18);
}

.hero-panel {
  display: flex;
  justify-content: flex-end;
}

.profile-card {
  width: 100%;
  max-width: 420px;
  padding: 2rem;
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--card-shadow);
  border: 1px solid var(--border);
}

.profile-badge {
  display: inline-flex;
  padding: 0.65rem 0.95rem;
  margin-bottom: 1.5rem;
  border-radius: 999px;
  background: var(--primary-soft);
  color: #0b5394;
  font-weight: 700;
}

.profile-summary p,
.profile-summary li {
  color: var(--muted);
}

.profile-summary ul {
  margin: 1rem 0 0;
  padding-left: 1.25rem;
}

.quick-links {
  margin-top: 1.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.quick-links a {
  flex: 1 1 45%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1rem;
  border-radius: 16px;
  background: rgba(37, 99, 235, 0.08);
  color: var(--primary);
  text-decoration: none;
  font-weight: 700;
}

main {
  padding: 0 2rem 4rem;
}

.section {
  padding: 3.5rem 0;
}

.section-alt {
  background: rgba(255, 255, 255, 0.9);
}

.container {
  width: min(1120px, 100% - 3rem);
  margin: 0 auto;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 2rem;
}

.section-heading span {
  display: inline-block;
  margin-bottom: 0.85rem;
  color: var(--primary);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.85rem;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(1.9rem, 2.2vw, 2.8rem);
  line-height: 1.05;
}

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.8rem;
}

.about-grid p {
  margin: 0 0 1.3rem;
  color: var(--muted);
}

.traits-card {
  padding: 1.75rem;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--card-shadow);
}

.trait-item {
  display: grid;
  gap: 0.35rem;
  margin-bottom: 1.25rem;
}

.trait-item strong {
  display: block;
  color: var(--text);
}

.skill-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}

.skill-group {
  padding: 1.75rem;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--card-shadow);
}

.skill-group h3 {
  margin-top: 0;
  margin-bottom: 0.85rem;
}

.skill-group p {
  margin: 0;
  color: var(--muted);
}

.projects-grid,
.certifications-grid,
.experience-grid,
.achievements-grid,
.contact-grid {
  display: grid;
  gap: 1.5rem;
}

.projects-grid,
.achievements-grid,
.certifications-grid,
.experience-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.project-card,
.cert-card,
.experience-card,
.achievement-card,
.contact-card,
.resume-panel,
.traits-card,
.profile-card,
.skill-group {
  padding: 1.75rem;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--card-shadow);
}

.project-card h3,
.cert-card h3,
.experience-card h3,
.achievement-card h3,
.contact-card h3 {
  margin-top: 0;
  margin-bottom: 1rem;
}

.project-card p,
.cert-card p,
.experience-card p,
.achievement-card p,
.contact-card p {
  margin: 0 0 1rem;
  color: var(--muted);
}

.project-meta {
  display: inline-flex;
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.08);
  color: var(--primary);
  font-size: 0.92rem;
  font-weight: 700;
}

.experience-notes {
  margin-top: 1.5rem;
  padding: 1.75rem;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--card-shadow);
}

.experience-notes h4 {
  margin-top: 0;
  margin-bottom: 1rem;
}

.experience-notes ul {
  margin: 0;
  padding-left: 1.25rem;
  color: var(--muted);
}

.experience-notes li {
  margin-bottom: 0.75rem;
}

.resume-section .resume-panel {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
}

.resume-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.contact-grid {
  grid-template-columns: 1fr 1.15fr;
}

.contact-details ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.contact-details li {
  margin-bottom: 0.9rem;
  color: var(--muted);
}

.social-links {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.social-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 1rem;
  border-radius: 18px;
  background: rgba(37, 99, 235, 0.08);
  color: var(--primary);
  text-decoration: none;
  font-weight: 700;
}

.contact-form {
  display: grid;
  gap: 1rem;
}

.form-group {
  display: grid;
  gap: 0.65rem;
}

.form-group label {
  font-weight: 600;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem;
  border-radius: 18px;
  border: 1px solid rgba(148, 163, 184, 0.25);
  background: #f8fafc;
  color: var(--text);
  font: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: 2px solid rgba(37, 99, 235, 0.35);
}

.footer {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.dark-mode {
  --bg: #0f172a;
  --surface: rgba(15, 23, 42, 0.92);
  --surface-strong: #111827;
  --text: #f8fafc;
  --muted: #cbd5e1;
  --primary-soft: rgba(96, 165, 250, 0.14);
  --border: rgba(148, 163, 184, 0.14);
  background: #020617;
}

body.dark-mode {
  background: #020617;
}

body.dark-mode .site-header {
  background: rgba(15, 23, 42, 0.92);
  border-color: rgba(148, 163, 184, 0.12);
}

@media (max-width: 1024px) {
  .hero-section {
    grid-template-columns: 1fr;
  }

  .contact-grid,
  .experience-grid,
  .certifications-grid,
  .projects-grid,
  .achievements-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .site-header {
    flex-direction: column;
    align-items: stretch;
  }

  .main-nav {
    justify-content: center;
  }

  .hero-actions,
  .resume-actions,
  .quick-links,
  .social-links {
    justify-content: center;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .site-header {
    padding: 1rem 1.25rem;
  }

  .hero-section {
    padding: 3rem 1.25rem 2.5rem;
  }

  .section {
    padding: 2.5rem 1.25rem;
  }

  .main-nav {
    gap: 0.85rem;
  }
}

.contact-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.contact-card li {
  margin-bottom: 0.75rem;
  color: #475569;
}

.contact-summary {
  background: #eef2ff;
}

.footer {
  text-align: center;
  padding: 2rem 1rem;
  color: #475569;
  font-size: 0.95rem;
}

@media (max-width: 960px) {
  header.hero-section,
  .about-grid,
  .projects-grid,
  .certifications-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .hero-card {
    justify-content: stretch;
  }
}

@media (max-width: 640px) {
  header.hero-section {
    padding-top: 2rem;
  }

  .hero-actions {
    flex-direction: column;
  }

  .skill-card,
  .project-card,
  .cert-card,
  .contact-card {
    padding: 1.4rem;
  }
}